[hobbit] Hobbitd settings in hobbitserver.cfg

[Charles Jones]

I've had much experience in dealing with this issue, as I have some 
client messages that are simply huge and required me having 
MAXMSG_STATUS=2048 and higher.

The problem you are experiencing is running out of shared memory. Here 
are the settings I have on my hobbit server that has 3.5GB of RAM:

]$ grep kernel.sh /etc/sysctl.conf
kernel.shmmni = 4096
kernel.shmmax = 3758096384

3758096384 is 3.5 * 1024 * 1024 * 1024

Once you edit those values and reboot (or sometimes sysctl -p will do it 
as root), then Hobbit can use more shared memory.

-Charles


The fix is to edit your /etc/sysctl.conf and define the kernel.shmmax to 
a value equal to your full system ram.


Michael Dunne wrote:
> Greetings,
>
>  Earlier today we added a system to our main hobbit server. Upon adding the
> system we received a hobbitd msg of:
>
> Oversize status msg fro xxx. xxxxx:ports truncated (n=294359, limit=262144)
>
> When I looked in the hobbitserver.cfg file to increase the maxmsg_status
> setting I did not see a listing  for maxmsg_status. Thinking that I was
> being smart, I added a ling to hobbitserver.cfg for maxmsg_client. The line
> added was as followed:
>
> MAXMSG_STATUS="768"
>
> I restarted hobbit after adding the line and saw the following message in
> the hobbitlaunch.log:
>
> 2006-09-25 11:48:12 Loading hostnames
> 2006-09-25 11:48:12 Loading saved state
> 2006-09-25 11:48:12 Setting up network listener on 0.0.0.0:1984
> 2006-09-25 11:48:12 Setting up signal handlers
> 2006-09-25 11:48:12 Setting up hobbitd channels
> 2006-09-25 11:48:12 Could not get shm of size 786432: Cannot allocate memory
> 2006-09-25 11:48:12 Cannot setup client channel
> 2006-09-25 11:48:12 Task hobbitd terminated, status 1
>
>
> I removed the line and restarted hobbit, but hobbitd kept failing. I tried
> rebooting the system, but hobbitd was still failing.
>
> Ultimately I stopped hobbit, deleted the hobbitd.pid file and restarted
> hobbit. All has been well since, excepting the original oversized status
> messages. 
>
> My question is, what did I do wrong? Where exactly should I add the
> maxmsg_status line (or the maxmsg_client, maxmsg_data, maxmsg_stachg for
> that matter)? 
>
> I am running 4.2.0.
>
> Thanks in advance for any assistance.
>
> Mike
>
> Michael Dunne
> Network Support Specialist
> AccuWeather, Inc. 
>
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>
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>
>
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